User guide

Watlow EZ-ZONE
®
PM PID Controller • 27 • Chapter 3 Keys and Displays
Responding to a Displayed Message
An active message will cause the display to toggle between the normal settings and the active message in the
upper display and [Attn] in the lower display.
Your response will depend on the message and the controller settings. Some messages, such as Ramping and
Tuning, indicate that a process is underway. If the message was generated by a latched alarm and the condi-
tion no longer exists or if an alarm has silencing enabled it can be silenced simply by pushing the Infinity ˆ
key. Alternatively, use the method below to view all and then clear.
Push the Advance Key to display [ignr] in the upper display and the message source (such as [al;h1]) in the
lower display.Use the Up ¿ or Down ¯ keys to scroll through possible responses, such as Clear [`CLr] or Si-
lence [`SiL]. Then push the Advance
‰
or Infinity ˆ key to execute the action. See the Home Page for fur-
ther information on the Attention Codes.
Display Parameter Name
Description
Range Appears If
[Attn]
Attention
An active message will cause
the display to toggle between
the normal settings and the
active message in the upper
display and [Attn] in the
lower display.
Your response will depend on
the message and the control-
ler settings. Some messages,
such as Ramping and Tun-
ing, indicate that a process is
underway. If the message was
generated by a latched alarm
or limit condition, the message
can be cleared when the con-
dition no longer exists. If an
alarm has silencing enabled, it
can be silenced.
Push the Advance Key to dis-
play [ignr] in the upper dis-
play and the message source
(such as [Li;h1]) in the lower
display.
Use the Up ¿ or Down ¯ keys
to scroll through possible re-
sponses, such as Clear [`CLr]
or Silence [`SiL]. Then push
the Advance
‰
or Infinity
ˆ key to execute the action.
Alternatively, rather than
scrolling through all messages
simply push the Infinity ˆ
button to generate a clear.
[AL;L1] [AL;L2] [AL;L3] [AL;L4]
Alarm Low 1 to 4
[AL;h1] [AL;h2] [AL;h3] [AL;h4]
Alarm High 1 to 4
[AL;E1] [AL;E2] [AL;E3] [AL;E4]
Alarm Error 1 to 4
[Er;i1] Error Input 1
[tUn1] Tuning 1
[`rP1] Ramping 1
[LP;o1] Loop Open Error 1
[LP;r1] Loop Reversed Error 1
[uAL;h] Value to high to be displayed
in 4 digit LED display
[uAL;L] Value to low to be displayed in
4 digit LED display
an alarm or error mes-
sage is active.